Archfiend of Spite

The reprisal clause is where the design lives. Most demons buy their power with a downside pointed at their controller: an upkeep drain, a life payment, a sacrifice tax. This one flips the arrangement outward, turning the act of hitting it into a punishment for whoever swings. Every point of damage an opponent's source deals to the body forces a choice between bleeding life or sacrificing permanents at a one-to-one rate, so a chump-blocked attack still bites, a burn spell aimed at the creature carries a tax on its own resolution, and a fight or a big blocker that trades with the 6/6 costs its controller six life or six permanents. The catch is what the clause reaches: it triggers only on damage dealt by an opponent's source, so destruction-based board wipes, exile, bounce, and edict effects all remove the Demon without paying a cent. It is a wall against the red-and-white school of pointing damage at problems, and porous against everything that answers a creature without dealing any. Madness is the other half of the package, and it reframes how the card arrives: a discard outlet turns a seven-mana body into a five-mana ambush cast from exile, with the reprisal clause live the instant it lands. Against the right removal suite the opponent never trades cleanly; against the wrong one, they barely notice it was there.